The tiered price referred to in Article 4(2)(b) shall, at the option of the applicant, be either:
no higher than the percentage set out in Annex III of the weighted average ex factory price charged by a manufacturer in markets of the Organisation for Economic Cooperation and Development (OECD) for the same product at the time of application; or
a manufacturer's direct production costs, with the addition of the maximum percentage which is set out in Annex III.